以聚乙二醇甲基丙烯酸酯(PEGMA)、甲基丙烯酸二乙氨基乙酯(DEAEMA)、甲基丙烯酸甲酯(MMA)为共聚单体，采用自由基聚合法合成一系列三元无规共聚物 P(PEGMA-co-DEAEMA-co-MMA)(PEDM)。通过傅里叶变换红外光谱(FT-IR)、核磁共振(1 H NMR)、凝胶渗透色谱(GPC)和动态热机械分析仪(DMA)等对无规共聚物的结构及性能进行了表征。采用溶剂挥发法将共聚物制备成膜，接触角测试表明共聚物膜具有一定的pH 值响应性；改变溶剂种类还可以调控膜的浸润性及表面形貌，并研究了不同膜表面的细胞粘附行为。
A new type of pH sensitive terpolymers was synthesized by free radical polymerization of polyethylene glycol methacrylate (PEGMA ), diethylaminoethyl methacrylate (DEAEMA ) and methyl methacrylate (MMA ).The obtained poly (polyethylene glycol methacrylate-co-diethylaminoethyl methacrylate-co-methyl methacrylate)(PEDM1-6 )were characterized using fourier transform infrared spectroscopy (FT-IR),proton nuclear magnetic resonance (1 H NMR),gel permeation chromatography (GPC),and dynamic mechanical ana-lyzer (DMA).Among them,the PEGM4 with adj usted tensile strength and elongation properties was used to prepare polymer film by a solvent evaporation method.The pH sensitivity of the resulting polymer film were in-vestigated by contact angle measurements.In addition,the wettability and surface morphology of the films were found to be controllable by changing the type and amount of the solvents.Moreover,the cell adhesion behavior on varying film surface were also investigated.
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